A multicomponent herbal feed additive improves somatic cell counts in dairy cows - a two stage, multicentre, placebo-controlled long-term on-farm trial.
bioactive compounds
dairy cows
feed additives
fertility
ketosis
udder health
Journal
Journal of animal physiology and animal nutrition
ISSN: 1439-0396
Titre abrégé: J Anim Physiol Anim Nutr (Berl)
Pays: Germany
ID NLM: 101126979
Informations de publication
Date de publication:
Mar 2020
Mar 2020
Historique:
received:
19
05
2019
revised:
08
11
2019
accepted:
11
11
2019
pubmed:
6
2
2020
medline:
17
12
2020
entrez:
6
2
2020
Statut:
ppublish
Résumé
In contrast to natural and historical diets of wild and domesticated ruminants, the diversity of plant species is limited in diets of modern dairy cows. Are "production diseases" linked to this? We conducted a trial to test the effects of a multicomponent herbal feed additive (HFA) on health, performance and fertility traits. A dose-finding study (DF) with 62 cows on 11 commercial farms compared a low (50 g) and a high (100 g) dose of HFA (HFA-50, HFA-100) with a placebo (PL). In a subsequent field trial (FT) with 280 cows on 30 commercial farms, HFA-100 was compared to PL. Cows were randomly assigned to HFA and PL groups and received HFA or PL individually daily from 14 days pre- to 300 days post-calving. Data were analysed with mixed effects models. No differences between HFA and PL were found regarding performance, body condition score and overall culling rates. A tendency towards lower milk urea for HFA-100 compared to PL (p = .06) was found in DF. HFA significantly reduced elevated milk acetone observations (≥10 mg/L) in the first 10 lactation weeks (HFA-100: 4%; HFA-50: 4%; PL: 12%) in DF. HFA-50 significantly reduced lameness incidence (HFA-100: 11%; HFA-50: 2%; PL: 14%) in DF. Calving intervals were 15 days shorter in HFA compared to PL in both trials, which could be confirmed by tendency (p = .07) in FT. In both trials, the proportion of test days with elevated somatic cell score (≥3.0) was significantly lower in HFA compared to PL (DF: HFA-100: 40%, HFA-50: 45% and PL: 55%; FT: HFA-100: 38% and PL: 55%) which is also reflected by tendency (p = .08) in lower culling rates due to udder diseases in FT. HFA showed no negative impact on any of the measured parameters. The effects of HFA indicate a potential of phytochemically rich and diverse feed additives for dairy cows' nutrition and physiology.
Substances chimiques
Phytochemicals
0
Types de publication
Journal Article
Multicenter Study
Randomized Controlled Trial, Veterinary
Langues
eng
Sous-ensembles de citation
IM
Pagination
439-452Informations de copyright
© 2020 Blackwell Verlag GmbH.
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